Fountain-pen.



E. DE LA RUE. FOUNTAIN PEN.

APPLICATION FILED AUG. 1. 1905.

PATENTED MAR. 13, 1906 I ing at 110 Bnnhill which the tained in the penitself.

shown in the accompanying .gsfiing a left-handed bayonet slot or slots0.

UNITED STATES PATENT OFFICE...

EVELYN onLA RUE, OF LONDON, ENGLAND.

' FOUNTAIN-PEN.

To all whom may concern: Be it known that I, EvnLrN on LA RUE, Iasu'bject of the Kin of Great Britain, resid fiow, in the city ofLondon, England have invented certain new anduseful Improvements inFountain-Pens, of following is aspecification.

The object of-th1s invention is to rovide a fountain-penwhioh may bereadily ii led without a separate filler by the aid of means con-According to this invention the pen is provided with a piston, which isnormally retained at tTiT' rear end of the barrel, but which can be engaed when it is necessary to fill the, pen by. the lead of a longitudinalrod which passes .out through the piston and the rearot the hand is soonred to a screw-cap. Prefcrab y the head of the rod is so formed as toact as a valve to shut oh the supply of ink to the nib when the pen isout of use.

A pen made according to this invention is drawings, of wh1ch Figure 1 isa longitudinal section of the pen with the parts in the )osition forwriting. Fig. 2 is a section with t e rod drawn back to engage thepiston, and Fig. 3 is a section with the plston in its forward position.

a is the barrel; 1) the rod which asses out through the rear end of thebarre and terminates in a cap I), which normally screws onto the threadaand holds the rod in its for ward position.

c is the piston, which is normally retained, as shown in Fig. 1, by apin or pins a, en-

on it is desired to fill the pen, the cap b is unscrewed and ulledrearward as far as ossible, when it is turned gently to the rightSpecification of Letters Patent. Application filed Augut 1,1905. SerillNo. 272,143-

bayonet Patented March 18,1906.

until a pin or ins b upon the rod b engage a right-handed ayonet slot orslots 0 1n the piston. The cap is then pulled a little farthe-r to therear and again turned to the right. The first art of the pins in theslots 0 and the remaining movement unlocks the pins atfrorn the slots0'. The piston cannow be pushed forward b means of, the cap and roduntil it is c locked by the stop a at the barrel, as shown in Fig. 3.The pen may now be'fillod as is an ordinary syringe, the ink being drawnup through the ducts supplying the nib.

in order to allow of the escape ofany ink '55 whiclrmay pass behind thepiston, a small vent a may be drilled throngh the rear end of thebarrel.

Preferably the head of the rod bis pro' vided with a valve 1;, whichcomes against a 60 seat d, formed in the nib-carrier d,'so that; byscrewing the cap b up tight 'no inkcan. escape and the pen ma be carriedin any po sition without fear 0 leakage. 'Wlienthe en is to be used, thecap I) must of course 65 e unscrewed more or less, accordingto'the flowof ink required.

What I claim is- In a fountain-pen, the combination of a piston,aloft-handed bayonet-fastening adapted 7o to retain it in the rear endof the barrel, a piston-rod contained in the barrel .and out through itsrear end, and a right; ande -fastening for engaging the rod with thepiston.

H. B. Cnantnm A. Nnwoimiil this turning movement locks 4 5.

front of the 50

